When does a doctor prefer insulin injections for a patient and what is the role of insulin in controlling level of glucose in blood?

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Solution

Insulin
Insulin injection is necessary if a person suffering from type 1 diabetes because your body does not create enough insulin.
If alternative therapies have failed to keep blood glucose levels within the recommended range, persons with type 2 diabetes or gestational diabetes may require insulin injection. Insulin injections keep the blood sugar within the desired range, which helps to prevent diabetic complications.
Role of Insulin
It encourages the body's cells to use glucose.
It promotes the storage of excess blood glucose as glycogen in the liver and muscles.

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